<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1>注册页面</h1>
<form action="">
  <input type="text" name="username" placeholder="用户名">
  <input type="text" name="password" placeholder="密码">
  <input type="text" name="nick" placeholder="昵称">
  <input type="button" value="注册" @click="reg()">
</form>

<script src="js/vue.min.js"></script>
<script src="js/axios.min.js"></script>
<script>

    let v = new Vue({
        el:"form",
        data:{
        },
        methods:{
          reg(){


              let data = new FormData(document.querySelector("form"))
              axios.post("/reg",data).then(function(response){
                  if(response.data==1){
                      alert("注册成功")
                  }else{
                      alert("用户名已存在")
                  }

              })
          }
        }
    })
</script>
</body>
</html>